If all people are unique, and if they are constantly changing each and every day, then all one can say about any social research finding is that it applied to that group of people on that given day, and given the propensity of humans to be different and to change, then it is unlikely that one would get the same results if one were to repeat the study.

A photograph never grows old. You and I change, people change all through the months and years, but a photograph always remains the same. How nice to look at a photograph of mother or father taken many years ago. You see them as you remember them. But as people live on, they change completely. That is why I think a photograph can be kind.